package com.interview03;

import java.util.List;
import java.util.UUID;
import java.util.concurrent.CopyOnWriteArrayList;

public class Demo1 {
    public static void main(String[] args) {

        //List<String> list = Collections.synchronizedList( new ArrayList<>());
        List<String> list = new CopyOnWriteArrayList();

        for (int i = 0; i < 30; i++) {
            new Thread( () ->{
                list.add(UUID.randomUUID().toString().substring(0,10));
                System.out.println(list);
            },"线程"+i).start();
        }


    }
}
